I just finished a set of heavy binding post, in brass.
The design is focused on ease of use, they can also handle lot of current. I drilled 6mm hole for cables.
I'm satisfied, the ability to hold the cable is strong, M8 threading provides lot of force, the diameter of knob allows to tighten strongly with little effort.
I decided to build them for an amplifier, the old commercial binding post had the thread broken, despite not having made heavy use. To ensure the connector to the frame I cut a M10 thread, strong enough for heavy load.
As usual, tons of pictures
PS: I was wrong to post, It should be it in the finished parts section